CN111641216A - Power grid power control method - Google Patents
Power grid power control method Download PDFInfo
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- CN111641216A CN111641216A CN202010665740.2A CN202010665740A CN111641216A CN 111641216 A CN111641216 A CN 111641216A CN 202010665740 A CN202010665740 A CN 202010665740A CN 111641216 A CN111641216 A CN 111641216A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a power grid power control method, which comprises the following steps: voltage stabilization control, local power control and remote power control. According to the power grid power control method, on the basis of stabilizing voltage, the summing group is used for judging different power control modes, local power control is achieved through comparison of the slip power and the control constant value, and meanwhile power control for remote equipment is achieved.
Description
Technical Field
The invention relates to the field of power grids, in particular to a power grid power control method.
Background
The existing load control terminal has limited number of interfaces, is mainly acquired by electric energy meter pulses, has poor instantaneity and accuracy, has general data processing capacity, cannot acquire user load data in real time, and has weak user load management capacity.
From the control requirement of user side coordination, the existing load control terminal can not meet the requirement of user side coordination control in aspects of data acquisition instantaneity, load control fineness and the like, and an efficient transmission mode of user load data real-time transmission, power control command real-time reception and load control real-time output needs to be designed according to the requirement of power grid load emergency response.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides a power grid power control method which is characterized by comprising the following steps.
And S1, voltage stabilization control, namely entering conventional load control or power grid emergency control, wherein the conventional load control sends a load switching instruction to a master station in the same region according to the calculation results of automatic control and auxiliary decision. The main station is used for carrying out partition calculation and regional control according to the scheduling load cutting instruction, then the main station directly issues a batch quick control instruction to the field interactive terminal, the terminal cuts off a corresponding secondary load line, and a user cannot automatically switch on the switch before the stable control time is over. When the main station sends an instruction for releasing the rapid control load line or the stable control time is over, the closing condition is recovered, and the user can close the corresponding line; when the power grid has an emergency fault, a load shedding quota instruction is issued to a rapid load shedding central station according to a calculation result, the central station issues a control instruction to an interactive terminal through a centralized control station, and the terminal cuts off a corresponding load line according to a preset cutting line combination.
And S2, local power control, wherein the terminal automatically monitors the current load change, and when the slip power of the terminal is greater than a control fixed value, a power overrun warning signal is sent according to the input control round sequence and the warning delay time requirement, and meanwhile, the power overrun time timing is started. And when the power over-limit timing time is longer than the current first power control set alarm time, if the slip power is still larger than the control fixed value, recording the current load power, and then executing a first round of tripping. And if the slip power is still larger than the control fixed value after tripping, sequentially executing next tripping according to the conditions until the slip power of the user load is lower than the control fixed value. When the slip power is less than the power control fixed value, the remaining round switches are not tripped any more. And recording the current load power 2min after the trip of the turn and storing for later reference.
The local power control also comprises the judgment of a terminal power control mode, and the judgment mode is as follows.
1) And when the terminal is in a power conservation state or a removal state, the terminal works in a power conservation mode. Otherwise, turning to 2) to judge.
The power protection state refers to that after the power protection state is put into, the control logic executes, but does not output a tripping signal, namely, the user load is not cut off; the rejecting state refers to that after the terminal receives the rejecting input command, the terminal does not respond to any broadcast command or terminal group address command until the rejecting exit command is received. And, only when the terminal is in a normal state, the control of the outlet is allowed. And the terminal automatically enters a power conservation state after the communication interruption is overtime, and automatically exits the power conservation state after the communication is recovered.
2) And when all control rounds of the summation group exit, or a slip power calculation window is not filled, or a terminal fault function is locked, the operation is in an idle mode. Otherwise, turning to the step 3).
3) When the total adding group is put into the current power down control and within the effective control time, the current first power control mode is operated. Otherwise, turning to 4) for judgment.
The first power control mode is local power control taking the current power reduction control power as a power fixed value, and when the power reduction control command is input, the current time is within the effective time of the reduction control, and the security fixed value is greater than 0, the first power control mode is entered to execute the power reduction control.
4) And when the total adding group reports and stops control input, the current time is in the reporting and stopping effective control time and the power control fixed value is not 0, the total adding group works in a second power control mode. Otherwise, turning to 5) to judge.
And the master station sends the report stop control parameters to the terminal according to the report stop start time and the report stop time applied by the client, and the terminal monitors the current load change in the report stop time period and executes the fixed value local power control of the second power control mode after receiving the report stop control input command.
5) And when the total group station rest control is put into operation, the current date is in the station rest day, the current time is in the effective control time of the station rest day, and the power control fixed value is not 0, the system works in a third power control mode. Otherwise, turning to 6) to judge.
And after receiving the command of putting into the station rest control, the terminal monitors the current load change in the control period of the station rest day and executes the local power control according to the fixed value of the third power control.
6) When the total group period is controlled to be put into use, the control period in which the current time is positioned is put into use, the control period in the put-into power control scheme has a corresponding power control fixed value and is not 0, and the power control period in which the control period is positioned is a controllable period, wherein the control state is control 1 or control 2, and the power control scheme works in a fourth power control mode. Otherwise, turning to 7) for judgment.
After receiving the periodic control input command, the terminal monitors the current load change in the effective control period of the command input, calculates the power fixed value of the time period according to the periodic power control fixed value corresponding to the command input, and executes local power control according to the control fixed value, wherein the power fixed value = the periodic power control fixed value (1 + floating coefficient).
7) And when the above conditions are not met, the system works in an idle mode.
And S3, remote power control, wherein after receiving the main station trip command, the terminal acquires a delay time parameter, executes the trip command after delaying the alarm time, and controls the load switches of the corresponding turns according to the turn parameters. Meanwhile, the terminal sends an alarm to inform the user and records information such as load power, trip time and the like before and after tripping. And after the terminal sends a command allowing the user to switch on or the remote control power limiting time is over, an alarm is sent to inform the user so that the user can switch on automatically and the tripping signal is removed.
After the electric charge management control function is activated, the main station controls the pre-purchased electric quantity of the user, calculates the residual electric quantity according to the pre-purchased electric quantity of the user and the collected electricity consumption of the electric meter, and controls the trip delay time according to the issued electric charge management command and cuts off the line of the corresponding turn of the user when the residual electric quantity is less than 0 or less than the arrearage alarm electric quantity. And when the pre-purchased electric quantity control or the power conservation is released, the closing condition is recovered.
According to the power grid power control method, on the basis of stabilizing voltage, the summing group is used for judging different power control modes, local power control is achieved through comparison of the slip power and the control constant value, and meanwhile power control for remote equipment is achieved.
Drawings
Fig. 1 is a flowchart of a power grid power control method according to the present invention.
Detailed Description
As shown in fig. 1, the present invention relates to a power grid power control method, including.
And S1, voltage stabilization control, namely entering conventional load control or power grid emergency control, wherein the conventional load control sends a load switching instruction to a master station in the same region according to the calculation results of automatic control and auxiliary decision. The main station is used for carrying out partition calculation and regional control according to the scheduling load cutting instruction, then the main station directly issues a batch quick control instruction to the field interactive terminal, the terminal cuts off a corresponding secondary load line, and a user cannot automatically switch on the switch before the stable control time is over. When the main station sends an instruction for releasing the rapid control load line or the stable control time is over, the closing condition is recovered, and the user can close the corresponding line; when the power grid has an emergency fault, a load shedding quota instruction is issued to a rapid load shedding central station according to a calculation result, the central station issues a control instruction to an interactive terminal through a centralized control station, and the terminal cuts off a corresponding load line according to a preset cutting line combination.
The interactive terminal has the functions of a conventional load terminal, and also needs to have a quick response power grid load limiting function, a conventional load management function, a sampling calculation function, a man-machine interface function, a master station telemechanical communication function, an event recording and file reading and writing function and the like, wherein the functions have different priorities in a real-time system and need to be realized in real time, so that an embedded real-time operating system needs to be designed for the terminal to schedule and distribute tasks in order to meet the requirements of multitask and real-time performance. The multi-task and multi-hierarchy system application platform designed for the intelligent interactive terminal is composed as follows.
(1) Developing based on a real-time embedded special operating system: based on DSP/BIOS high-performance real-time preemptive task operating system.
(2) Real-time multitask scheduling: the task switching is triggered by interruption, and the real-time performance is guaranteed.
(3) Real-time user interface layer interoperation: under the control of tasks, the human-computer interface operation response is timely and rapid.
(4) Supporting large-capacity event file storage: and event storage and file read-write operation management are supported.
(5) Supporting remote tool debugging: the device supports connection with a debugging tool, realizes monitoring information output, and ensures real-time monitoring of the hardware state of the device.
And S2, local power control, wherein the terminal automatically monitors the current load change, and when the slip power of the terminal is greater than a control fixed value, a power overrun warning signal is sent according to the input control round sequence and the warning delay time requirement, and meanwhile, the power overrun time timing is started. And when the power over-limit timing time is longer than the current first power control set alarm time, if the slip power is still larger than the control fixed value, recording the current load power, and then executing a first round of tripping. And if the slip power is still larger than the control fixed value after tripping, sequentially executing next tripping according to the conditions until the slip power of the user load is lower than the control fixed value. When the slip power is less than the power control fixed value, the remaining round switches are not tripped any more. And recording the current load power 2min after the trip of the turn and storing for later reference.
The local power control also comprises the judgment of a terminal power control mode, and the judgment mode is as follows.
1) And when the terminal is in a power conservation state or a removal state, the terminal works in a power conservation mode. Otherwise, turning to 2) to judge.
The power protection state refers to that after the power protection state is put into, the control logic executes, but does not output a tripping signal, namely, the user load is not cut off; the rejecting state refers to that after the terminal receives the rejecting input command, the terminal does not respond to any broadcast command or terminal group address command until the rejecting exit command is received. And, only when the terminal is in a normal state, the control of the outlet is allowed. And the terminal automatically enters a power conservation state after the communication interruption is overtime, and automatically exits the power conservation state after the communication is recovered.
2) And when all control rounds of the summation group exit, or a slip power calculation window is not filled, or a terminal fault function is locked, the operation is in an idle mode. Otherwise, turning to the step 3).
3) When the total adding group is put into the current power down control and within the effective control time, the current first power control mode is operated. Otherwise, turning to 4) for judgment.
The first power control mode is local power control taking the current power reduction control power as a power fixed value, and when the power reduction control command is input, the current time is within the effective time of the reduction control, and the security fixed value is greater than 0, the first power control mode is entered to execute the power reduction control.
4) And when the total adding group reports and stops control input, the current time is in the reporting and stopping effective control time and the power control fixed value is not 0, the total adding group works in a second power control mode. Otherwise, turning to 5) to judge.
And the master station sends the report stop control parameters to the terminal according to the report stop start time and the report stop time applied by the client, and the terminal monitors the current load change in the report stop time period and executes the fixed value local power control of the second power control mode after receiving the report stop control input command.
5) And when the total group station rest control is put into operation, the current date is in the station rest day, the current time is in the effective control time of the station rest day, and the power control fixed value is not 0, the system works in a third power control mode. Otherwise, turning to 6) to judge.
And after receiving the command of putting into the station rest control, the terminal monitors the current load change in the control period of the station rest day and executes the local power control according to the fixed value of the third power control.
6) When the total group period is controlled to be put into use, the control period in which the current time is positioned is put into use, the control period in the put-into power control scheme has a corresponding power control fixed value and is not 0, and the power control period in which the control period is positioned is a controllable period, wherein the control state is control 1 or control 2, and the power control scheme works in a fourth power control mode. Otherwise, turning to 7) for judgment.
After receiving the periodic control input command, the terminal monitors the current load change in the effective control period of the command input, calculates the power fixed value of the time period according to the periodic power control fixed value corresponding to the command input, and executes local power control according to the control fixed value, wherein the power fixed value = the periodic power control fixed value (1 + floating coefficient).
7) And when the above conditions are not met, the system works in an idle mode.
In the above description, the related terms are introduced as follows.
(1) A circuit: the load lines involved in power control are typically determined at the time of terminal installation. The user load circuit has the parameters of name, voltage multiplying power, current multiplying power, rated (secondary) voltage, rated (secondary) current, rated load, power supply wiring mode and the like. The terminal supports more than 8 load line acquisitions.
(2) And (3) total adding: the combination (power) composed of several lines (primary power) and the terminal has 8 total groups. Each summation group can be configured with positive and negative directions according to the set line summation line power, the line power participating in the summation calculation can be configured with positive and negative directions, the accumulation error can not occur when the lines with reverse power are summed, and any line can be configured into any summation group.
(3) Load power: and taking each lmin as the average power of the alternating current samples calculated in the window period.
(4) Slip power: and calculating the average power in the time window by taking the power calculation slip time (min) set by the main station as the length of the power calculation window.
(5) Power setting value: the preset maximum load power fixed value is compared with the security power fixed value every time in order to ensure the electricity consumption of users, and if the preset maximum load power fixed value is lower than the security power fixed value, the security power fixed value is used as a load limiting power fixed value.
(6) And (3) power control mode: the method is a terminal power control working mode, the local power control has a first power control mode, a second power control mode, a third power control mode and a fourth power control mode, and the four modes are idle modes when not switched in and are power-conserving modes when not allowing to switch user loads.
(7) Turn alarm delay time: is the pre-trip (power comparison) delay time set for each round of local power control. There are two round alert times, one for the common round alert time (second power control, third power control, fourth power control) for all the summations, and another for the independent round alert time for the first power control within the summations.
And S3, remote power control, wherein after receiving the main station trip command, the terminal acquires a delay time parameter, executes the trip command after delaying the alarm time, and controls the load switches of the corresponding turns according to the turn parameters. Meanwhile, the terminal sends an alarm to inform the user and records information such as load power, trip time and the like before and after tripping. And after the terminal sends a command allowing the user to switch on or the remote control power limiting time is over, an alarm is sent to inform the user so that the user can switch on automatically and the tripping signal is removed.
After the electric charge management control function is activated, the main station controls the pre-purchased electric quantity of the user, calculates the residual electric quantity according to the pre-purchased electric quantity of the user and the collected electricity consumption of the electric meter, and controls the trip delay time according to the issued electric charge management command and cuts off the line of the corresponding turn of the user when the residual electric quantity is less than 0 or less than the arrearage alarm electric quantity. And when the pre-purchased electric quantity control or the power conservation is released, the closing condition is recovered.
According to the power grid power control method, on the basis of stabilizing voltage, the summing group is used for judging different power control modes, local power control is achieved through comparison of the slip power and the control constant value, and meanwhile power control for remote equipment is achieved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A method of grid power control, comprising:
s1, voltage stabilization control is carried out, and conventional load control or power grid emergency control is carried out, wherein the conventional load control sends a load switching instruction to a master station in the same region according to the calculation results of automatic control and auxiliary decision; the method comprises the following steps that a main acquisition station is used for carrying out partition calculation and regional control according to a scheduling load cutting instruction, then the main station directly issues a batch quick control instruction to a field interactive terminal, the terminal cuts off a corresponding secondary load line, and a user cannot automatically switch on before the stable control time is over; when the main station sends an instruction for releasing the rapid control load line or the stable control time is over, the closing condition is recovered, and the user can close the corresponding line; when the power grid has an emergency fault, a load shedding quota instruction is issued to a rapid load shedding central station according to a calculation result, the central station issues a control instruction to an interactive terminal through a centralized control station, and the terminal cuts off a corresponding load line according to a preset cutting line combination;
s2, local power control, wherein the terminal automatically monitors the current load change, and when the slip power of the terminal is greater than a control fixed value, a power overrun warning signal is sent according to the input control round sequence and the warning delay time requirement, and meanwhile, the power overrun time timing is started; when the power over-limit timing time is longer than the current first power control set alarm time, if the slip power is still larger than the control fixed value, recording the current load power, and then executing a first round of tripping; if the slip power is still larger than the control fixed value after tripping, sequentially executing next tripping according to conditions until the slip power of the user load is lower than the control fixed value; when the slip power is smaller than the power control fixed value, the remaining round switches are not tripped any more; recording the current load power 2min after the trip of the turn and storing for later reference;
the local power control also comprises the judgment of a terminal power control mode, and the judgment mode is as follows:
when the terminal is in a power conservation state or a removal state, the terminal works in a power conservation mode; otherwise, turning to the step 2) for judgment;
the power protection state refers to that after the power protection state is put into, the control logic executes, but does not output a tripping signal, namely, the user load is not cut off; the rejecting state refers to that after the terminal receives the rejecting input command, the terminal does not respond to any broadcast command or terminal group address command until the rejecting exit command is received; and, only when the terminal is in the normal state, allow to control the exit; the terminal automatically enters a power conservation state after the communication interruption is overtime, and automatically exits the power conservation state after the communication is recovered;
2) when all control rounds of the total adding group exit, or a slip power calculation window is not filled, or a terminal fault function is locked, the operation is in an idle mode; otherwise, turning to the step 3) for judgment;
3) when the total adding group is put into the current power down control and within the effective control time of the total adding group, the total adding group works in a current first power control mode; otherwise, turning to 4) for judgment;
the first power control mode is local power control taking the current power reduction control power as a power fixed value, and when a power reduction control command is input, the current time is within the effective time of reduction control and the security fixed value is greater than 0, the first power control mode is entered to execute the power reduction control;
4) when the total adding group reports and stops control input, the current time is in the reporting and stopping effective control time and the power control fixed value is not 0, the total adding group works in a second power control mode; otherwise, turning to 5) for judgment;
according to the time of the start and stop of the report applied by the client, the master station sends down report stop control parameters to the terminal, and after the terminal receives a report stop control input command, the terminal monitors the current load change in the report stop time period and executes the fixed value local power control of the second power control mode;
5) when the total station rest control is put into operation, the current date is in the station rest day, the current time is in the effective control time of the station rest day, and the power control fixed value is not 0, the total station rest control system works in a third power control mode; otherwise, turning to 6) for judgment;
after receiving the command of putting into the station rest control, the terminal monitors the current load change in the control period of the station rest day and executes the local power control according to the fixed value of the third power control;
6) when the total group period control input and the control period input at the current time are input, the control period in the input power control scheme has a corresponding power control fixed value and is not 0, and the power control period at the control period is a controllable period, wherein the control state is control 1 or control 2, and the total group period control input works in a fourth power control mode; otherwise, turning to 7) for judgment;
after receiving a periodic control input command, the terminal monitors the current load change in an effective control period of the command input, calculates a power fixed value of the time period according to a periodic power control fixed value corresponding to the command input, and executes local power control according to the power fixed value = periodic power control fixed value (1 + floating coefficient);
7) when all the above conditions are not met, the system works in an idle mode;
s3, remote power control, wherein after receiving a master station trip command, the terminal acquires a delay time parameter, executes the trip command after delaying alarm time, and controls a load switch of a corresponding turn according to the turn parameter; meanwhile, the terminal sends an alarm to inform a user and records information such as load power, trip time and the like before and after tripping; after the terminal sends a command allowing the user to switch on or the remote control power limiting time is over, an alarm is sent to inform the user so that the user can switch on automatically and a tripping signal is removed;
after the electricity charge management control function is activated, the master station controls the pre-purchased electricity quantity of the user, calculates the residual electricity quantity according to the pre-purchased electricity quantity of the user and the collected electricity consumption of the electricity meter, controls the trip delay time according to the issued electricity charge management command and cuts off the line of the corresponding turn of the user when the residual electricity quantity is less than 0 or less than the arrearage alarm electricity quantity; and when the pre-purchased electric quantity control or the power conservation is released, the closing condition is recovered.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102520298A (en) * | 2012-01-05 | 2012-06-27 | 广西电网公司电力科学研究院 | On-site detecting system for electrical power load management terminal and detecting method thereof |
| CN106972499A (en) * | 2017-05-09 | 2017-07-21 | 许继集团有限公司 | A kind of accurate cutting load control system |
| CN107681783A (en) * | 2017-10-19 | 2018-02-09 | 国电南瑞科技股份有限公司 | A kind of precisely cutting load control system control terminal |
| US20190173282A1 (en) * | 2016-08-16 | 2019-06-06 | Origami Energy Limited | Power distribution control system with improved responsiveness |
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2020
- 2020-07-11 CN CN202010665740.2A patent/CN111641216B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520298A (en) * | 2012-01-05 | 2012-06-27 | 广西电网公司电力科学研究院 | On-site detecting system for electrical power load management terminal and detecting method thereof |
| US20190173282A1 (en) * | 2016-08-16 | 2019-06-06 | Origami Energy Limited | Power distribution control system with improved responsiveness |
| CN106972499A (en) * | 2017-05-09 | 2017-07-21 | 许继集团有限公司 | A kind of accurate cutting load control system |
| CN107681783A (en) * | 2017-10-19 | 2018-02-09 | 国电南瑞科技股份有限公司 | A kind of precisely cutting load control system control terminal |
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